Watch regulator



No. 62!,245. Patented Mar. l4, I899.

' E. HART.

WATCH REGULATOR.

(Application filed 1m. 20, 1mm

(No Model.)

UNITED STATES PATENT OFFICE.

EDWIN HART, OF \VATERBURY, CONNECTICUT, ASSIGNOR TO THE NElV ENGLAND WVATCI-I COMPANY, OF SAME PLACE.

WATCH- REG U LATO R.

SI ECIFICATION forming part of Letters Patent No. 621,245, dated March 14, 1899.

Application filed December 28, 1898. Serial No. 700,509. (N0 model.)

To aZZ whom it may concern.-

Be it known that I, EDWIN HART, of Waterbury, in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Watch-Regulators; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which--- Figure 1 is a perspective View of a watchregulator embodying my invention; Fig. 2, a top plan view thereof Fig. 3, a section on the line a; 00 of Fig. 2, and Fig. 4 a detail perspective viewof the regulator-arm and the adjusting device separated from each other.

Letters of like name and kind refer to like parts in each of the figures.

The object of my invention is to provide means for adjusting watcl1-regulators which will enable very close regulation of the hairspring, will hold the regulator-arm in the position to which it is adjusted, so that accidental movement or derangement will beimpossible, and be very simple; and to these ends said invention consists in the regulator having the construction substantially as hereinafter specified. r

In the regulation of watches it is very desirable that the adjustment of the regulator be not done by inexperienced persons, but only by persons of skill, and it is therefore an advantage to have the regulator of such construction that the use of some special appliance or tool shall be necessary to move it, so that the adjustment can only be made by one having the tool and who is competent to do it, the jeweler or watch-repairer. It is also very important that accidental movement or shifting of the regulator be impossible, which, for example, can occur in the recasing of a watch-movement at the factory, it being the practice to run and regulate the movement in a working case and then to transfer it to another case. It is obvious that the unintentional movement of the regulator would be a serious thing, and in a factory where several hundred 'movements a day are recased there is chance for the derangement of the time of such a percentage of movements as to be a matter of considerable consequence. My regulator will be found to meet the above noted requirements and to possess other prac tical advantages.

As illustrated in the drawings, the regn lator-arm A is pivoted, as usual, to the balance cook or bridge B and has the usual radial extension at by which it is connected with the hair-spring. The outer end of the regulatorarm is, as usual, given the form of a pointer or index a to cooperate with the usual scale C marked on the bridge or cock, and between such index a and the arm-pivot the arm has an elongated opening or slot D, within which is a circular piece or disk E, that fills said slot transversely, so as to engage the arm on on posite sides thereof, and is mounted eccentrically upon the end of a pin 6 in an opening in the cock or bridge, which pin forms a pivot on which said disk may be turned to move the regulator-arm i 11 one direction or the other. The pivot-pin of course is situated at a point that is on a radial line midway between the extremities of the scale, and the eccentricity of the disk is such that the range of movement of the regulator-arm does not extend beyond the limits of the scale. To enable the disk to be turned, it is provided in its outer face with a diametrically-extending slit or groove F for the reception of a screwdriver, and as without such a tool the disk cannot be turned it will be seen that the regulator-arm cannot be moved otherwise, as the disk constitutes a lock that holds the arm against movement by force applied directly to, the arm. Accidental movement of the regulator is thus efficiently guarded against, and the likelihood of adjustment of the regulator by any one but a skilled or competent person is very slight because of the lack of a suitable instrument by which to manipulate the disk. It will also be apparent that very close adjustment of the regulator is possible.

Having thus described my invention, what I claim is- 4 1. In a regulator, the combination of the regulator-arm carrying an index or pointer, and provided with a slot or opening, and an eccentric disk engaging the sides of said slot or opening, substantially as and for the purpose described.

2. In a regulator, the combination of the pivoted regulator-arm carrying an index or pointer, and provided with a slot or opening have hereunto set my hand this 19th day of between its pivot and said pointer, and an December, A. D. 1898. eccentric disk Within the slot enga in the I 7 r1 sides thereof, and constructed for ogergtion EDWIN EARL 5 by a tool, substantially as and for the purpose XVitnesses:

described. JAMEs I'I. FRENEY,

In testimony that I claim the foregoing I F. B. DEANE. 

